Motion transforming mechanism



June I, 1937. c, DE BRUlN 2,082,483

' MOTION TRANSFORMING MECHANISM Filed Oct. 16, 1936 2 Sheets-Sheet 1 AZficdadeBrai/z 6 944M June 1, 1937. A c, DE um 2,082,483

MOTION TRANSFORMING MECHANI SM Filed Oct 16, 1956 v 2 Sheets-Sheet 2 3mm I ywww Patented June 1, 1937 UNITED STATES aeszuss MOTION TRANSFORMING MECHANISM Alfred C. de Bruin, Columbus, Ohio Application October 16, 1936, Serial No. 105,969

7 Claims.

This invention relates generally to power transmitting mechanism. In its more specific aspects, the invention relates to power heads of the type employed in capacities where it is desired to transform rotative movement into reciprocating linear movement. This type of power head is especially adaptable for use in conjunction with deep well reciprocating plunger pumps and slide type pumps used in the mining industry for draining mines.

The primary object of the present invention resides in the provision of a power head employing a small number of working parts and one which will operate efficiently, with a minimum amount of attention.

A further object rests in the employment of roller type bearings so arranged as to support certain working parts of the power head in such manner as to eliminate excessive overhang which would introduce strain and undue wear.

A still further object is theprovision of a power head employing a plurality of operating shafts positioned concentrically to produce a symmetrical design which materially decreases the over all height of the power head and makes it more compact than previous devices of this character.

Another object is the employment of a pair of gears on the power shaft which will more evenly distribute the applied load, lessening strain on any one particular part and lengthening the period of active service of the mechanism.

With these and other objects in view, the invention resides in the novel features of construction and arrangement of parts as set forth in the following description taken in connection with the accompanying drawings, wherein:

Fig. l is a perspective view of a power head constructed in accordance with the present invention and provided with a driving motor;

Fig. 2 is a vertical longitudinal sectional view taken through the power head;

Fig. 3 is a vertical transverse sectional view on the plane indicated by the line IIIIII of Fig. 2;

Fig. 4 is a similar view on the line IV-IV of Fig. 2;

Fig. 5 is a rear end elevation of the mechanism showing the same in different positions of movement in dotted lines.

Referring more particularly to the drawings, the complete power head is designated generally by the numeral i and includes a cast metallic housing 2 on the upper surface of which is mounted an electric motor 3. One end of the armature shaft of the motor is equipped with a pulley 4 about which an endless driving belt 5 is passed. A second pulley G of consider-ably larger size is engaged and driven by the belt 5, the pulley'B being keyed to the outer end of the main shaft 7 of the power head.

A base plates is secured to the housing 2 by bolts 9 or the like passing through lugs H3 formed with the housing adjacent its lower edge. Secured to the'bas'e within the housing 2 is a frame member I I, the latter member being formed with a horizontal bore which extends completely through the frame. The ends of the bore are enlarged as at [2 for the reception of antifriction roller bearings H which rotatably support a pair of disks l4 and Ma. The disk Ma is integrally formed with the rear face of a large internal gear I5 positioned at the forward end of the frame member i Arranged in meshing relationship with the teeth of the gear 15 is an idler gear i6 rotatably supported on a stud member Mia. The stud Hia is rigidly secured in connection with a block I! anchored to the base at the forward end thereof. A small driving pinion I8 meshes with the idler gear to transmit rotary movement from the main shaft 1 to the idler and the internal gear l5. The driving gear I8 is keyed to the shaft 1 in registration with the teeth of the gear i5 so that both the former gear and the idler gear l6 will be positioned within the confines of the gear I5 to conserve space.

It will be apparent, from an inspection of Fig. 3, that when the shaft 1 and the pinion I8 rotate, the idler [6 will cause the gear l5 to rotate in a direction opposed to that of the shaft 1.

The gear I5 is keyed as at l9 to a hollow shaft extension 20 formed with the disk I4 and the ends of the bore in the extension 20 contain sleeve bearings 2i to rotatably receive the shaft 1 in concentric relation thereto. At the inner or rear end of the shaft 1, a second driving pinion 22 is keyed to rotate in unison therewith. This pinion meshes with a second internal gear 23 which is smaller in size than the first internal gear and is carried by a circular plate which is rotatably supported on a crank pin 2 extending parallel to the shaft 7 and projecting from the face of the disk Hi. When the pinion 22 is rotated by the shaft 1, the engagement of the former with the gear 23 causes rotation of the a latter gear about the pin 24 in a similar direction. Since the pin 24 is carried by the disk [4 and the latter is rotating in a direction opposed to the shaft 1, a compound rotary movement is transmitted to the gear 23.

This movement is best illustrated in Fig. 5 of the drawings, wherein the gear member 23 is shown in different stages of movement by dotted lines. When the shaft 1 rotates, the pin supporting the gear 23 revolves about the center of the shaft 1 and, due to the meshing engagement of the pinion and the gear, rotation of the latter also takes place with the result that a stud-like boss 25 formed on the rear face of the gear 23 is caused to reciprocate in a plane passing through the center of the shaft. The boss 25 is located in alignment with the shaft 1 when the mechanism is in the position illustrated in the drawings. The distance from the center line of the boss 25 to the center line of the pin 24 is equal to the distance from the center line of the latter to the center line of the shaft 1.

A bearing member 26 is positioned upon the boss 25 and a connecting rod 21 secured thereto. The rod 21 extends outwardly through a packed gland 28 secured to the side of the housing 2. When the shaft 1 is revolved, reciprocatory sliding movement will be transmitted to the rod 21. The outer end of the rod 21 is threaded so that a similar rod extending to the operating mechanism of a pump (not shown) may be coupled therewith.

While the boss 25 has been illustrated as moving in a horizontal plane, it will be noted that the plane of movement may be changed to any angle as desired by merely changing the position of the pin 24 with respect to the boss 25 when the latter is in alignment with the main shaft.

The ratio of the gear members l5, l6, I8, 22, and 23 is such that the latter gear will make one complete revolution for each revolution of the gear l5.

By the provision of the roller bearings and their location relative to the disk I, undue overhang of the members 23 and 25 on the pin 24 is prevented and therefore excessive strain at this point is eliminated. Also, through the employment of the twin pinions l8 and 22, power is distributed equally to both ends of the mechanism which will result in extended and efficient service.

While .there has been illustrated a single particular embodiment of the invention, it will be observed that many slight changes may be made in the construction and operation of the various parts of the machine without departing from the spirit and scope of the invention as set forth in'the following claims.

What is claimed is:

1. A device for transforming rotary motion to rectilinear motion comprising a frame, a pair of concentrically arranged shafts rotatably carried by said frame, means for rotating said shafts in opposite directions, an eccentrically positioned pin carried by the outer of said shafts, an internal gear rotatably supported on said pin, an

external pinion fixed to rotate with said inner shaft in meshing engagement with said internal gear, a boss projecting from the rear face of said internal gear, and a slide pivotally mounted on said boss.

2. A device for transforming rotary motion to rectilinear motion comprising a frame, a pair of concentrically arranged shafts rotatably carried by said frame, an internal gear fixed to one end of said outer shaft for rotation therewith, a pinion fixed for rotation with the inner shaft in registration with said internal gear, an idler gear mounted for rotation about a stationary center,

said idler being in meshing relationship with said pinion and said internal gear, a pin eccentrically carried by the opposite end of said outer shaft, a second internal gear rotatably carried by said pin, a second pinion keyed to said inner shaft in meshing relationship with said second one of said pinions and said internal gear, a pin eccentrically carried by the opposite end of said outer shaft, a circular plate rotatably carried by said pin, an internal gear formed with said plate, said internal gear being in meshing engagement with the other of said pinions, a stud projecting from the rear face of said circular plate, and a rod pivotally connected to said stud and extending at right angles thereto,

4. A mechanism of the character described comprising a frame, a pair of antifriction bearings positioned in opposite ends of said frame, a disk rotatably received in each of said bearings, means for connecting said disks for rotation together, a shaft supported in said disks in concentric relation thereto, pinions keyed to said shaft adjacent the outer faces of said disks, an internal gear formed with one of said disks, an idler gear arranged in meshing relationship with said internal gear and one of said pinions, a pin eccentrically positioned on the other of said disks, a circular plate rotatably mounted on said pin, a second internal gear formed with said plate and meshing with the other of said pinions, and a slide pivoted eccentrically of said plate.

5. A device for transforming rotary to rectilinear motion comprising a frame, a pair of concentrically arranged shafts rotatably carried by said frame, a pin eccentrically carried by the outer of said shafts, a circular plate rotatably carried by said pin, means carried by the inner of said shafts and cooperating with a portion of said plate to cause the rotation thereof, means for transmitting controlled rotary movement to said shafts whereby said plate will be rotated one complete revolution for each revolution of said outer shaft, and a slide pivoted eccentrically of said plate.

6. A device for transforming rotary to rectilinear motion comprising a support, a hollow shaft rotatably mounted in said support, a second shaft rotatably mounted in said hollow shaft in concentric relation thereto, cooperative gear mechanism carried by said shafts at one end of said support, said gearing operating to cause controlled rotation of said shafts in opposite directions, a crank pin eccentrically carried by the hollow shaft, a plate member rotatably mounted on said crank pin, means carried by said inner shaft and cooperating with said plate whereby rotation will be imparted to the latter, the direction of rotation of said plate being similar to that of said inner shaft, and a slide pivoted eccentrically of said plate, the degree of eccentricity of the connection of said rod with said plate being substantially equal to that of the crank pin on the hollow shaft.

7. A power head of the type described comprising a support, a main shaft, a tubular shaft rotatably supporting said main shaft, disk means carried by said tubular shaft adjacent the end portions thereof, antifriction bearings provided in said support for the rotatable reception of said disk means and said tubular shaft, gear means provided on one of said disks, a pinion positioned intermediate the ends of said main shaft, motion transmitting mechanism connecting said gear means and said pinion, said motion transmitting mechanism providing for the reverse rotation of said tubular shaft with respect to said main shaft, a second pinion positioned at one end of said main shaft, a crank pin provided on the other of said disks, a second gear rotatably mounted on said crank pin, said second gear being arranged in meshing relationship with said second pinion whereby said second gear will be rotated in a direction similar to said main shaft, and a slide having a pivotal connection with said second gear arranged eccentrically of said second gear.

ALFRED C. DE BRUIN. 

